Effect of Thermal Contact Conductanceon Temperature Field of CFRTP/Stainless Steel Laser Direct Joining

Qiang, 王强 Wang; Junke, 焦俊科 Jiao; Shaoping, 昝少平 Zan; Wenwu, 张文武 Zhang

doi:10.3788/cjl201744.0402002

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the heat transfer at the material interface, since the polymer matrix of the CFRTP composite experiences the heating, melting, and flowing processes, the contact thermal resistance only influences the temperature field before the melting. On the other hand, contact thermal resistance is affected by external pressure, which is required for laser direct joining of CFRTP composite with aluminum alloy; Wang et al have shown that when the external pressure reached a certain level it could be regarded as an ideal contact heat transfer [36]. Therefore, the effect of contact thermal resistance was ignored during the temperature simulation of laser direct joining.…”

Section: Simulation Modeling Of Temperature Field During Laser Direct...mentioning

confidence: 99%

Effect of Temperature Distribution on Interfacial Bonding Process between CFRTP Composite and Aluminum Alloy during Laser Direct Joining

Wang,

Fu,

Wang

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

Laser direct joining enables non-destructive and lightweight joining of carbon fiber reinforced thermoplastic (CFRTP) composites and aluminum alloys. The interfacial bonding process determines the joint performance and is influenced by the time-varying temperature distribution. However, the interfacial bonding process occurs inside the joint, making it difficult to study the effect of temperature distribution. To resolve this issue, a novel online observation device for the interfacial bonding process between CFRTP composites and aluminum alloys is design, and the polymer melting, flowing, and bonding with metal during laser direct joining are observed. Further, temperature field simulation models for laser direct joining are established, and temperature distribution and gradient are calculated. The results show that the temperature distribution determines the melting of CFRTP composites, and bubbles generated by the thermal decomposition of the polymer hinder the melting. The temperature gradient is related to the movement of the molten matrix and fibers, and the movement towards the aluminum alloy induces cracking and delamination. Once the interface is filled with polymer, the motion changes to along the laser scanning direction and the joining defects are reduced. The study can provide a foundation for promoting interfacial bonding and reducing the defects of laser direct joining.

show abstract

Section: Simulation Modeling Of Temperature Field During Laser Direct...mentioning

confidence: 99%

Effect of Temperature Distribution on Interfacial Bonding Process between CFRTP Composite and Aluminum Alloy during Laser Direct Joining

Wang,

Fu,

Wang

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

Research on carbon fiber reinforced thermal polymer/stainless steel laser direct joining

Jiao

Wang

et al. 2018

Journal of Laser Applications

View full text Add to dashboard Cite

To improve the numerical simulation accuracy of carbon fiber reinforced thermal polymer (CFRTP)/stainless steel laser direct joining (LDJ), a fitting formula of thermal contact conductance was established based on experiments in this paper. Taking into account the thermal contact resistance, a three-dimensional finite element thermal contact model of LDJ was established, and the theoretical simulation and experimental results were compared and analyzed. The result showed that the thermal contact model was more consistent with the reality compared with the traditional model. This thermal contact model could be used to characterize the influence of clamping pressure on the laser joining quality. When the laser power was 318 W and the clamping pressure was 0.1 MPa, the relative error of the melting width was 17.8% for the traditional model and 6.7% for the thermal contact model considering the thermal conductivity. The numerical simulation accuracy could be improved in the process of LDJ. With this numerical model, relationships between the thermal behaviors and the joining parameters were studied numerically. The CFRTP/stainless steel laser joining experiments were also carried out, and the result showed that the joint width measured agreed well with the numerical result.

show abstract

碳纤维增强复合材料与钛合金激光连接仿真

Ruomu¹,

Jiejie²,

Rongshi³

et al. 2023

Chin. J. Laser

View full text Add to dashboard Cite

Effect of Thermal Contact Conductanceon Temperature Field of CFRTP/Stainless Steel Laser Direct Joining

Cited by 3 publications

References 0 publications

Effect of Temperature Distribution on Interfacial Bonding Process between CFRTP Composite and Aluminum Alloy during Laser Direct Joining

Effect of Temperature Distribution on Interfacial Bonding Process between CFRTP Composite and Aluminum Alloy during Laser Direct Joining

Research on carbon fiber reinforced thermal polymer/stainless steel laser direct joining

碳纤维增强复合材料与钛合金激光连接仿真

Contact Info

Product

Resources

About